Motek Hall 5, 5321 Stand
Test bench applications place high demands on torque limiting safety couplings, overwhelm the marketable designs quickly. In addition, the available installation space due to the increasingly compact designs are getting smaller. Mayr Antriebstechnik therefore the new Safety clutch EAS HSC (High Speed Compact) for speeds up to 12.000 min-1 developed.
In the testing technology must transfer torque limiting safety couplings at extremely high speeds, the torque backlash-free and torsionally stiff. Suitable for this purpose only residual torque separating, ie free-type safety couplings for overload in the stored rotational energy can flow freely into the disconnected masses.
Safety couplings in high-speed applications in each individual component must have a high degree of balance for optimum smoothness of the drive train is guaranteed in combination of components. Therefore, the optimization of the mass imbalance during the development of the high-speed clutch the top of the specification. In addition to its extremely compact design reduces high power density the rotating masses. This has a positive effect on running and machine dynamics. The clutch is fully assembled on a balancing grade of G 2,5 at a reference speed 3000 min-1 balanced.
If the torque in the drive train to the set of EAS HSC limit, the EAS HSC unlocks a unique activation mechanism. This keeps them safe in a disengaged position. The torque drops immediately, a built-in limit switch accepts the disengagement and switches off the drive. The signal from the limit switch can also be used for other control functions. The clutch disconnects the input and output completely and remains in this state until it is locked in place by hand or through devices again.
In normal operation, the torque is transmitted by bullets in the EAS HSC that engage simultaneously in reductions of the hub and drive flange. Disc springs stretch the balls in front of a ring. The amount of spring force is proportional to the transmitted torque. This principle is also at play wear on the cuts. The disc springs have a falling characteristic. As a result, the torque is transmitted rotationally rigid up to the preset trip level. In case of overload reduces the biasing force of the spring and the clutch releases very precisely.
The couplings transmit the torque backlash-free in operation and provide for overload for a free run of the drive components. During the follow-up time are no engagement impacts that would adversely affect the drive train. A re-engagement happens "sync" only to the released position. This is often required when the input and output must always have the same angular relationship to one another.
The EAS HSC Series offers five sizes with nominal torques of up 5 1000 Nm. Depending on the size are speeds of up 6000 12.000 min-1 permitted.